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US 2015/0092831 A1Published application
Equalization Method and Equalizer for Received Signals in Microwave MIMO System
AssigneeHuawei Technologies Co., Ltd.
InventorRui Lv
Life of this patent
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Abstract
The present invention provides an equalization method and an equalizer for received signals in a microwave MIMO system. By performing vertical spatial filtering on and combining internal sub-signals for n received signals, an initial sliced signal corresponding to a received signal currently to be decoded is obtained; (n−1) ICI signals are generated based on (n−1) initial sliced signals corresponding to other (n−1) received signals; after the (n−1) ICI signals are eliminated from the n received signals, vertical spatial filtering is performed and internal sub-signals are combined to obtain a final sliced signal.
Claims19
An equalization method for received signals in a multiple-input multiple-output (MIMO) system, the method comprising:
- performing vertical spatial filtering on n received signals, wherein n is the total number of transmit antennas in the MIMO system;
- combining internal sub-signals for the n received signals after vertical spatial filtering, to obtain an initial sliced signal and a coefficient for vertical spatial filtering corresponds to a received signal currently to be decoded among the n received signals, so that the initial sliced signal corresponds to the received signal currently to be decoded;
- receiving (n−1) initial sliced signals respectively corresponding to (n−1) received signals other than the received signal currently to be decoded among the n received signals, wherein each initial sliced signal is obtained by performing vertical spatial filtering on the n received signals;
- combining internal sub-signals for the n received signals after vertical spatial filtering, wherein a coefficient for each vertical spatial filtering corresponds to one of the (n−1) received signals other than the received signal currently to be decoded among the n received signals;
- generating (n−1) inter-channel interference ICI signals based on the (n−1) initial sliced signals respectively corresponding to the (n−1) received signals other than the received signal currently to be decoded among the n received signals;
- eliminating ICI from the n received signals based on the (n−1) ICI signals to obtain n ICI-eliminated signals;
- and
- performing vertical spatial filtering on and combining internal sub-signals for the n ICI-eliminated signals, to obtain a final sliced signal.
5 more elements
An equalizer comprising:
- a first vertical filtering unit, configured to perform vertical spatial filtering on n received signals, wherein n is the total number of receive antennas in a multiple-input multiple output MIMO system, and a coefficient for vertical spatial filtering corresponds to a received signal currently to be decoded among the n received signals;
- a first combining unit, configured to combine internal sub-signals for the n received signals after vertical spatial filtering, to obtain an initial sliced signal and output it to other (n−1) equalizers, wherein the initial sliced signal corresponds to the received signal currently to be decoded;
- an interference generating unit, configured to receive (n−1) initial sliced signals output by first combining units of the other (n−1) equalizers, wherein the (n−1) initial sliced signals respectively correspond to (n−1) received signals other than the received signal currently to be decoded among the n received signals, wherein each initial sliced signal is obtained by performing vertical spatial filtering on the n received signals and combining internal sub-signals for the n received signals after vertical spatial filtering, wherein a coefficient for each vertical spatial filtering corresponds to one of the (n−1) received signals other than the received signal currently to be decoded among the n received signals;
- and generate (n−1) inter-channel interference ICI signals based on the (n−1) initial sliced signals respectively corresponding to the (n−1) received signals other than the received signal currently to be decoded among the n received signals;
- an interference eliminating unit, configured to eliminate ICI from the n received signals based on the (n−1) ICI signals to obtain n ICI-eliminated signals;
- a second vertical filtering unit, configured to perform vertical spatial filtering on the n ICI-eliminated signals;
- and
- a second combining unit, configured to combine internal sub-signals for the n ICI-eliminated signals after vertical spatial filtering, to obtain a final sliced signal.
5 more elements
An equalizer, comprising:
- a processor;
- and
- a computer-readable storage medium storing instructions to be executed by the processor, the program including instructions for:
- performing vertical spatial filtering on n received signals received from a MIMO system, wherein n is the total number of transmit antennas in the MIMO system;
- combining internal sub-signals for the n received signals after vertical spatial filtering, to obtain an initial sliced signal and a coefficient for vertical spatial filtering corresponds to a received signal currently to be decoded among the n received signals, so that the initial sliced signal corresponds to the received signal currently to be decoded;
- receiving (n−1) initial sliced signals respectively corresponding to (n−1) received signals other than the received signal currently to be decoded among the n received signals, wherein each initial sliced signal is obtained by performing vertical spatial filtering on the n received signals;
- combining internal sub-signals for the n received signals after vertical spatial filtering, wherein a coefficient for each vertical spatial filtering corresponds to one of the (n−1) received signals other than the received signal currently to be decoded among the n received signals;
- generating (n−1) inter-channel interference ICI signals based on the (n−1) initial sliced signals respectively corresponding to the (n−1) received signals other than the received signal currently to be decoded among the n received signals;
- eliminating ICI from the n received signals based on the (n−1) ICI signals to obtain n ICI-eliminated signals;
- and
- performing vertical spatial filtering on and combining internal sub-signals for the n ICI-eliminated signals, to obtain a final sliced signal.
8 more elements
Dependencies are inferred from the claim text.